New system requirements.

Author: dkocher

mountainduck/installation/index.md

@@ -60,14 +60,16 @@ Using the MSI Installer, you'll have to install the *MSI Package Shell Extension
 
 - Mountain Duck 3.3.5 or later requires *macOS 10.12* or later
 - Mountain Duck 3.0.1 or later requires *macOS 10.11* or later
+- Mountain Duck 5.0.0 or later requires *macOS 11.3* or later
 ````
 
 ````{group-tab} Windows
 
 Requires *.NET Framework 4.7.2.* If the {download}`.Net Framework installation<https://dotnet.microsoft.com/download/dotnet-framework/net472>` fails, download it manually.
 
 - Mountain Duck 3.2.0 or later requires *Windows 7, Windows 8.1, Windows 10 (14393)* or later on 64Bit.
-- Mountain DUck 3.0.1 or later requires *Windows 7* or later.
+- Mountain Duck 3.0.1 or later requires *Windows 7* or later.
+- Mountain Duck 5.0.0 or later requires *Windows 10, version 2004* or later.
 ````
 `````